S-400 Strip Vent -- The original, continuous soffit venting solution is still the best choice for venting overhangs and eaves – and once architects find out about it, they spec it on every job! With 10 sq. inches NFVA per foot, S-400 provides superior intake ventilation for any detail – from zero overhang to open rafter tails. There really are as many ways to install S-400 Strip Vent as there are eave construction details 1" x 11/2" x 4' cross section gives you maximum soffit/eave ventilation in a minimum space 10 sq. in. NFVA per lineal foot S-400 fits narrow spaces where other vents can’t, like zero overhangs Self-cleaning – vertical flute orientation doesn’t show the dirt 24 4-foot pcs. per ctn. (96 lin. ft.) Crush resistant so you can install with a power nail gun Pair up S-400 with any of COR-A-VENT’S ridge vent products for an unbeatable system Can be installed in multiple layers for additional ventilation